The new prefix length will be 32 10 22 So new Subnet mask is 2552552520 TDC 413

The new prefix length will be 32 10 22 so new subnet

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The new prefix length will be 32 – 10 = / 22 . So, new Subnet mask is 255.255.252.0 . TDC 413 72 Rami Ghannam, DePaul University
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JoyCo Example Subnet sizes must be powers of 2. The smallest power of 2 that is greater than 1000 is 2 10 = 1024. This would give them 1024 – 2 = 1022 valid host addresses in each subnet. Thus, each IP address needs 10 Host bits. The new prefix length will be 32 – 10 = / 22 . So, new Subnet mask is 255.255.252.0 . The difference between old prefix length (16) and new prefix length (22) is 22-16 = 6 , so 6 bits are borrowed: Number of new subnets = 2 6 = 64 subnets TDC 413 72 Rami Ghannam, DePaul University
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JoyCo Example Subnet sizes must be powers of 2. The smallest power of 2 that is greater than 1000 is 2 10 = 1024. This would give them 1024 – 2 = 1022 valid host addresses in each subnet. Thus, each IP address needs 10 Host bits. The new prefix length will be 32 – 10 = / 22 . So, new Subnet mask is 255.255.252.0 . The difference between old prefix length (16) and new prefix length (22) is 22-16 = 6 , so 6 bits are borrowed: Number of new subnets = 2 6 = 64 subnets We also could have figured this as 65,536 / 1024 = 64 TDC 413 72 Rami Ghannam, DePaul University
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Calculating JoyCo Subnets First Subnet ID will be the original network address with the new prefix length. First Subnet ID is 130.88.0.0 / 22 New Subnet Mask = 255.255.252.0 TDC 413 73 Rami Ghannam, DePaul University
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Calculating JoyCo Subnets First Subnet ID will be the original network address with the new prefix length. First Subnet ID is 130.88.0.0 / 22 New Subnet Mask = 255.255.252.0 Two ways to calculate other subnet IDs: Start with first subnet ID and add 1024 IP addresses to it. This will increase value in 3 rd byte by 1024 / 256 = 4 . TDC 413 73 Rami Ghannam, DePaul University
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Calculating JoyCo Subnets First Subnet ID will be the original network address with the new prefix length. First Subnet ID is 130.88.0.0 / 22 New Subnet Mask = 255.255.252.0 Two ways to calculate other subnet IDs: Start with first subnet ID and add 1024 IP addresses to it. This will increase value in 3 rd byte by 1024 / 256 = 4 . Magic number = 4 TDC 413 73 Rami Ghannam, DePaul University
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Calculating JoyCo Subnets First Subnet ID will be the original network address with the new prefix length. First Subnet ID is 130.88.0.0 / 22 New Subnet Mask = 255.255.252.0 Two ways to calculate other subnet IDs: Start with first subnet ID and add 1024 IP addresses to it. This will increase value in 3 rd byte by 1024 / 256 = 4 . magic number = 4 The “magic number” for each byte determines how much that byte changes between successive network IDs. TDC 413 73 Rami Ghannam, DePaul University
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Calculating JoyCo Subnets First Subnet ID will be the original network address with the new prefix length. First Subnet ID is 130.88.0.0 / 22 New Subnet Mask = 255.255.252.0 Two ways to calculate other subnet IDs: Start with first subnet ID and add 1024 IP addresses to it. This will increase value in 3 rd byte by 1024 / 256 = 4 .
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